Sam Whittle created BEAM-13684:
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Summary: Consider adding information to ProcessBundleRequest
indicating there is no existing state
Key: BEAM-13684
URL: https://issues.apache.org/jira/browse/BEAM-13684
Project: Beam
Issue Type: Improvement
Components: beam-model
Reporter: Sam Whittle
This allows for skipping all state fetches made during processing this key,
preloading the cache with empty values for the key, or extending the cache to
include this negative state information to avoid fetches as long as no state is
evicted for the key.
This is particularly beneficial in sparse key streaming pipelines where such
new keys are common.
It could also be used to avoid fetches in batch pipelines where there is no
persisted state.
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